Latches in the Aerospace Industry

Latches are a highly critical component of any aircraft. For instance, when an aircraft is at cruising altitude, doors and other openings must be sealed and totally secure. Beyond this, latches have many different types and applications throughout an aircraft, appearing in the radome, engine nacelle, auxiliary power unit doors, and more. There are four main manufacturers that produce five main types of latches found on aircraft. The major manufacturers are Arconic Fastening Systems, Lisi Aerospace, Hartwell Corporation, and Avibank Manufacturing. The main latches they produce include shear pin latches, shear/tension latches, channel latches, pressure relief latches, and hook latches. This blog will explain each type and provide some insight into their applications.

Shear pin latches are intended for shear application and are made available in double shear pin and multi-pin configurations. Shear pins can be oriented around the longitudinal or perpendicular axis of the latch. shear/tension latches are used to secure light to heavy duty hinged doors, panels and structures. They are designed to withstand the tension and shear load combinations experienced by stressed panels where loads are carried by a door or panel.

Channel latches are very simple, they are designed with ease of entry in mind for frequently accessed panels, doors, or hatches. Because of their basic design, they are not approved for pressurized compartments and cannot withstand significant load weight.

Pressure relief door latches, found on cowls or thrust reversers, provide controlled pressure release in these key areas of the aircraft. They are able to withstand loads ranging from 30 to 250 lbs and can operate at temperatures from -60 degrees to 900 degrees Fahrenheit. The final latch type, hook latches, appear on engine fan cowls and thrust reversers, providing reliability and quick access. Lower profile latches can be used in tight dimensions while still providing ease of opening and closure. There are a variety of other latches in use on an aircraft for minor tasks such as door & overhead compartment locking as well as flush handle controls.

During the design of an aircraft, it’s crucial for designers to find the right latches for the job. At ASAP Axis, owned and operated by ASAP Semiconductor, we can help you find all types of latches for the aerospace, civil aviation, and defense industries. We’re always available and ready to help you find all the aviation parts and equipment you need, 24/7-365. For a quick and competitive quote, email us at sales@asapaxis.com or call us at 1-920-785-6790.



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February 16, 2021

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